Update Github CI

Author: Markus Schlegel

.github/workflows/ci.yml

@@ -15,11 +15,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        build: [pinned, stable, beta, nightly, macos, win-msvc, win-gnu]
+        build: [stable, beta, nightly, macos, win-msvc, win-gnu]
         include:
-        - build: pinned
-          os: ubuntu-latest
-          rust: 1.65.0
         - build: stable
           os: ubuntu-latest
           rust: stable
@@ -40,7 +37,7 @@ jobs:
           rust: stable-x86_64-gnu
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Install Rust
       uses: dtolnay/rust-toolchain@master
       with:
@@ -53,10 +50,10 @@ jobs:
 
   clippy:
     name: clippy
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Rust
         uses: dtolnay/rust-toolchain@master
         with:
@@ -67,10 +64,10 @@ jobs:
 
   rustfmt:
     name: rustfmt
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Install Rust
       uses: dtolnay/rust-toolchain@master
       with: